Buyer opened case but I'm on holiday

buyer is saying there's an issue (debatable) however I'm happy to accept a return but I'm on holiday untill the 13th (a week on Monday) so how do I go about this? because if I accept the return I won't be able to collect it! and I'm assuming I need to action something within 48hrs?

do I just request support from Vinted? and they'll assist with an extension on timeframe?

Edit 2 add -

• cos it'll be returned to an inpost locker and I don't have any family where I live to ask to get it for me and the one person I could ask is also away on holiday 😔

My husband just suggested can I request it to be returned to an inpost locker where I am as opposed to my home one I sent it from?? Or does it only let you have it returned to the same one?